CN102485663A - Constructed wetland composite filling material for water treatment and preparation method thereof - Google Patents
Constructed wetland composite filling material for water treatment and preparation method thereof Download PDFInfo
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- CN102485663A CN102485663A CN2011100570745A CN201110057074A CN102485663A CN 102485663 A CN102485663 A CN 102485663A CN 2011100570745 A CN2011100570745 A CN 2011100570745A CN 201110057074 A CN201110057074 A CN 201110057074A CN 102485663 A CN102485663 A CN 102485663A
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Abstract
The invention discloses a constructed wetland composite filling material for water treatment and a preparation method thereof. The constructed wetland composite filling material for water treatment is composed of small balls having sizes of 8 to 17 millimeters and comprises: by weight, 10 to 20% of sludge, 20 to 30% of red mud, 5 to 10% of straw carbon, 3 to 8% of sodium silicate, 1 to 5% of kaolin, 6 to 15% of white cement and the balance water. The preparation method comprises the following steps of carrying out dehydration, drying and crushing processes respectively on sludge and red mud, crushing and carbonizing straw, mixing sodium silicate, kaolin, white cement, the obtained straw carbon, the crushed red mud and the crushed sludge according to a certain ratio, adding water into the mixture, stirring to obtain small balls having sizes of 8 to 17 millimeters, heating the small balls at a temperature of 80 to 250 DEG C, carrying out heat preservation, naturally cooling to room temperature, and drying in air. The constructed wetland composite filling material for water treatment has wide raw material sources, a low cost, good hydrophily, a large specific surface area, high porosity, strong adsorptivity and good bio-film formation effects, and improves sewage pollutant removal effects produced by a constructed wetland.
Description
Technical field
The invention belongs to the environment protection water treatment field, being specifically related to a kind of is the artificial swamp compounded mix of main raw material with alumina producer industrial residue red mud, municipal wastewater treatment plant excess sludge and crop residues stalk.
The invention still further relates to the preparation method of above-mentioned artificial swamp compounded mix.
Background technology
Artificial swamp is a kind of wastewater treatment new technology that recent two decades grows up; Owing to it has less investment, energy consumption is low, working cost is low, treatment effect is stable, the anti impulsion load ability is strong, can improve ecoscape and thereby species diversity produces advantages such as certain economic and ecological benefits; Be widely used in various water treatments, particularly domestic sewage in rural areas by using is handled at present.
Mechanism of pollutants is very complicated in the artificial swamp removal sewage.In fact, it is a kind of ecological wastewater processing technology, mainly utilizes physics, chemistry and biological acting in conjunction in the ecosystem to purify waste water; But generally speaking; Wetland is removed the effect of filler in effect and the wetland that pollutent can be classified as the plant of planting in the wetland, and wherein filler plays key effect: on the one hand, the filler in the wetland itself has the function of absorb polluted matter preferably; On the other hand; Filler in the wetland is the place that mikrobe provides a large amount of breedings, perched, and these mikrobes and plant, pollutent interact, thereby has realized the removal of pollutent.
The filler majority that adopts in the wetland at present is to be main with sandstone.This is that the wetland of main stuffing has significant disadvantages with the sandstone, and comprising: the artificial swamp floor space is big, and it is low that the aquatic and hygrophyte of implanting on wet land filler and the wet land filler is removed efficient to pollutants in sewage, and particularly the clearance of nitrogen and phosphorus is very low.Lip-deep microbe population of wet land filler and kind are few, thereby the aquatic and hygrophyte root system that causes implanting on the wet land filler is few to the plant absorbing of nitrogen and phosphorus, and wetland is low to the removal efficiency of nitrogen and phosphorus of sewage.In addition, for the sewage of low ratio of carbon to ammonium, the sandstone filler can't be the sewage supplementary carbon source, therefore is that the wetland of main stuffing is very low to the pollutants removal rate of low carbon-nitrogen ratio sewage with the sandstone.
The processing of solid waste is to face one of the great environmental pollution that needs to be resolved hurrily and problem of environment protection, the strong basicity waste residue red mud that produces in a large amount of excess sludges that produce in the particularly municipal sewage, the aluminum oxide industry and the crop residues stalk in rural area at present both at home and abroad with disposing.According to estimates, at present the annual surplus sludge volume that produces of China municipal wastewater treatment plant up to 100,000,000 tons about, the annual red mud that produces of China's aluminium industry reaches 2,000,000 tons, rural area crop residues stalk output reaches 700,000,000 tons.These solid waste are not all effectively handled at present and are disposed.Therefore, how to handle and dispose the important subject and a urgent difficult problem of hoping solution that these solid waste have become current sciemtifec and technical sphere effectively.In fact, contain SiO in the red mud
2, Al
2O
3, Fe
2O
3With CaO isoreactivity metal ingredient, be desirable dephosphorization raw material as wet land filler; The excess sludge of municipal administration domestic sewage factory contains great number of organic matters and nutritive ingredient, can be used as carrier after treatment and provides abundant organic and micro-for its surperficial microorganism growth; In addition, the residual thing stalk of farm crop contains more carbon, the ideal material of supplementary carbon source when being artificial swamp processing low carbon-nitrogen ratio sewage.
Up to now, do not see that it is the artificial swamp compounded mix of main raw material and the report for preparing this artificial swamp compounded mix method that the crop residues stalk in employing municipal excess sludge in domestic sewage plants, aluminum oxide industry waste residue red mud and rural area is arranged.
Summary of the invention
The object of the present invention is to provide a kind of artificial swamp compounded mix that is used for water treatment.
Another purpose of the present invention is to provide a kind of method for preparing above-mentioned artificial swamp compounded mix.
For realizing above-mentioned purpose, the artificial swamp compounded mix that is used for water treatment provided by the invention is the bead of particle diameter 8-17mm, and the weight percent of its composition is:
Mud 10%-20%, red mud 20%-30%, stalk carbon 5%-10%, water glass 3%-8%, kaolin 1%-5%, white cement 6%-15%, surplus is a water.
The method of the above-mentioned artificial swamp compounded mix of preparation provided by the invention may further comprise the steps:
1) with mud and red mud dewatered drying and pulverizing respectively, with crushed stalk and carbonization;
2) stir adding water behind the red mud in the step 1, mud and stalk carbon and water glass, kaolin, the white cement proportional mixing, be prepared into the bead of particle diameter 8-17mm; The weight percent of above-mentioned component is: mud 10%-20%, and red mud 20%-30%, stalk carbon 5%-10%, water glass 3%-8%, kaolin 1%-5%, white cement 6%-15%, surplus is a water;
3) with the bead of step 2 preparation in 80-250 ℃ of heating down, insulation, naturally cool to after the room temperature air-dry.
In the described method, red mud is that the aluminum oxide industry sintering process prepares red mud, bayer's process that aluminum oxide produces and prepares red mud and the mixed combining method that aluminum oxide produces and prepare the red mud that aluminum oxide produces; Mud is the excess sludge of municipal sanitary sewage disposal factory.
In the described method, mud in the step 1 and red mud pulverize separately are 80-200 purpose particle diameter.
In the described method, be 1-4 hour the heat-up time in the step 3.
In the described method, the soaking time in the step 3 is 1-2 hour.
In the described method, naturally cool to after the room temperature natural air drying after water seasoning 3-12 hour in the step 3.
Positive beneficial effect of the present invention is:
Raw material sources are extensive, and are with low cost; The artificial swamp compounded mix good hydrophilic property of preparation, specific surface area is big, and porosity is high, adsorptivity is strong, and bio-film colonization is effective; Its good adsorption performance has improved the removal effect of artificial swamp to pollutent in the sewage, has particularly improved the removal effect of artificial swamp to pollutent nitrogen and phosphorus; Can be used as supplementary carbon source and improve the C/N ratio in the sewage, thereby improved the treatment effect of artificial swamp low carbon-nitrogen ratio sewage; Be used for artificial swamp, not only can handle Zhong Shui, little pollution landscape water, can also handle municipal sewage, domestic sewage in rural areas by using.
Embodiment
The present invention is the artificial swamp compounded mix that the main raw material preparation is used for water treatment in view of the element characteristics of the crop residues stalk in municipal excess sludge in domestic sewage plants, aluminum oxide industry waste residue red mud and rural area with above-mentioned three kinds of solid waste.
The method for preparing the artificial swamp compounded mix of the present invention may further comprise the steps:
1) with municipal excess sludge in domestic sewage plants with aluminum oxide industry waste residue red mud dewaters respectively, dries and use kibbler to be crushed to particle diameter is the 80-200 order.Crushed stalk is also used the charring furnace carbonization.
2) with adding the water stirring behind red mud, mud and stalk carbon and the water glass of preparation in the step 1, kaolin, the white cement proportional mixing, be prepared into the bead of particle diameter 8-17mm with tablets press, its weight percent is: mud 10%-20%; Red mud 20%-30%; Stalk carbon 5%-10%; Water glass 3%-8%; Kaolin 1%-5%; White cement 6%-15%; Surplus is a water.
3) with the bead of preparation in the step 2 80-250 ℃ of down heating 1-4 hour, be incubated 1-2 hour, naturally cool to room temperature after, water seasoning 3-12 hour, promptly get these article behind the natural air drying.
Used red mud source can be that the aluminum oxide industry sintering process prepares the red mud that aluminum oxide produces in the raw material of the artificial wetland compounded mix of the present invention, also can be that bayer's process prepares the red mud that aluminum oxide produces, and can also be that mixed combining method prepares the red mud that aluminum oxide produces.
Used mud source mainly is the excess sludge of municipal sanitary sewage disposal factory in the raw material of the artificial wetland compounded mix of the present invention.
Used water glass, kaolin and white cement all plays the effect of sticker in the raw material of the artificial wetland compounded mix of the present invention.Wherein, water glass had both played the effect of sticker, played the effect of pore-forming material again.
Be used for the method for the artificial swamp compounded mix of water treatment below in conjunction with the present invention with the preparation of the crop residues stalk in municipal excess sludge in domestic sewage plants, aluminum oxide industry waste residue red mud and rural area, embodiment of the present invention is described.
Embodiment 1
1) municipal excess sludge in domestic sewage plants and aluminum oxide industry waste residue red mud being dewatered respectively, dry and use kibbler to be crushed to particle diameter is 100 orders.Crushed stalk is also used the charring furnace carbonization.
2) with adding the water stirring behind red mud, mud and stalk carbon and the water glass of preparation in the step 1, kaolin, the white cement proportional mixing, be prepared into the bead of particle diameter 15mm with tablets press, the weight percent that is used to prepare the artificial swamp compounded mix is: mud 20%; Red mud 30%; Stalk carbon 10%; Water glass 5%; Kaolin 5%; White cement 15%; Water 15%.
3) with the bead of preparation in the step 2 100 ℃ of down heating 2 hours, be incubated 1 hour, naturally cool to room temperature after, water seasoning 3 hours promptly gets these article behind the natural air drying.
Embodiment 2
1) municipal excess sludge in domestic sewage plants and aluminum oxide industry waste residue red mud being dewatered respectively, dry and use kibbler to be crushed to particle diameter is 200 orders.Crushed stalk is also used the charring furnace carbonization.
2) with adding the water stirring behind red mud, mud and stalk carbon and the water glass of preparation in the step 1, kaolin, the white cement proportional mixing, be prepared into the bead of particle diameter 8mm with tablets press, the weight percent that is used to prepare the artificial swamp compounded mix is: mud 20%; Red mud 30%; Stalk carbon 10%; Water glass 8%; Kaolin 5%; White cement 15%; Water 12%.
3) with the bead of preparation in the step 2 200 ℃ of down heating 1 hour, be incubated 2 hours, naturally cool to room temperature after, water seasoning 4 hours promptly gets these article behind the natural air drying.
Embodiment 3
1) municipal excess sludge in domestic sewage plants and aluminum oxide industry waste residue red mud being dewatered respectively, dry and use kibbler to be crushed to particle diameter is 80 orders.Crushed stalk is also used the charring furnace carbonization.
2) with adding the water stirring behind red mud, mud and stalk carbon and the water glass of preparation in the step 1, kaolin, the white cement proportional mixing, be prepared into the bead of particle diameter 15mm with tablets press, the weight percent that is used to prepare the artificial swamp compounded mix is: mud 18%; Red mud 30%; Stalk carbon 8%; Water glass 4%; Kaolin 5%; White cement 15%; Water 20%.
3) with the bead of preparation in the step 2 150 ℃ of down heating 4 hours, be incubated 1 hour, naturally cool to room temperature after, water seasoning 3 hours promptly gets these article behind the natural air drying.
Adopt balance test in batches, studied the adsorption isotherm characteristic of compounded mix of the present invention, and contrast with coarse sand commonly used to phosphorus.The result shows, compounded mix of the present invention and coarse sand commonly used are respectively 35mg/Kg and 18.69mg/Kg to the theoretical s-adsorption of phosphorus, compounded mix of the present invention to the adsorptive capacity of phosphorus apparently higher than the adsorptive capacity of coarse sand to phosphorus.
Simulate the post experiment under the same conditions, in the cylindrical glass post that two diameters are 30cm, fill 80cm high compounded mix of the present invention and coarse sand respectively, the phosphorous water of simulation that adopts same concentrations is as water inlet.The result shows that compounded mix of the present invention is 87% to the average removal rate of TP, and coarse sand is merely 54% to the average removal rate of TP, product compounded mix of the present invention to the clearance of TP apparently higher than the clearance of coarse sand to TP.
Claims (8)
1. an artificial swamp compounded mix that is used for water treatment is the bead of particle diameter 8-17mm, and the weight percent of its composition is: mud 10%-20%; Red mud 20%-30%, stalk carbon 5%-10%, water glass 3%-8%; Kaolin 1%-5%, white cement 6%-15%, surplus is a water.
2. method for preparing the said artificial swamp compounded mix of claim 1 may further comprise the steps:
1) with mud and red mud dewatered drying and pulverizing respectively, with crushed stalk and carbonization;
2) stir adding water behind the red mud in the step 1, mud and stalk carbon and water glass, kaolin, the white cement proportional mixing, be prepared into the bead of particle diameter 8-17mm; The weight percent of above-mentioned component is: mud 10%-20%, and red mud 20%-30%, stalk carbon 5%-10%, water glass 3%-8%, kaolin 1%-5%, white cement 6%-15%, surplus is a water;
3) with the bead of step 2 preparation in 80-250 ℃ of heating down, insulation, naturally cool to after the room temperature air-dry.
3. method according to claim 2, wherein, red mud is that the aluminum oxide industry sintering process prepares red mud, bayer's process that aluminum oxide produces and prepares red mud and the mixed combining method that aluminum oxide produces and prepare the red mud that aluminum oxide produces.
4. method according to claim 2, wherein, mud is the excess sludge of municipal sanitary sewage disposal factory.
5. method according to claim 2, wherein, mud in the step 1 and red mud pulverize separately are 80-200 purpose particle diameter.
6. method according to claim 2, wherein, be 1-4 hour the heat-up time in the step 3.
7. method according to claim 2, wherein, the soaking time in the step 3 is 1-2 hour.
8. method according to claim 2 wherein, naturally cools to after the room temperature natural air drying after water seasoning 3-12 hour in the step 3.
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102746023A (en) * | 2012-06-15 | 2012-10-24 | 中国建筑股份有限公司 | Constructed wetland matrix filling material for simultaneous nitrogen and phosphorus removal and its preparation method |
| CN103073151A (en) * | 2013-01-05 | 2013-05-01 | 清华大学 | Control system and technology of agricultural non-point source pollution based on hedgerows and multilayer percolation ponds |
| CN103073258A (en) * | 2013-02-05 | 2013-05-01 | 中国环境科学研究院 | Filler prepared by using P1-type coal ash molecular sieve and preparation method |
| CN103880193A (en) * | 2014-04-08 | 2014-06-25 | 北京师范大学 | Method for treating wastewater from livestock and poultry breeding by constructing vertical flow artificial wetland based on water supply plant sludge |
| CN104003524A (en) * | 2014-05-19 | 2014-08-27 | 湖南大学 | Ecological adsorption floating bed used for treating eutrophication |
| CN105152340A (en) * | 2015-06-23 | 2015-12-16 | 西安建筑科技大学 | Red mud phosphate-removing filling material for constructed wetland and preparation method thereof |
| CN105198012A (en) * | 2015-08-07 | 2015-12-30 | 刘广利 | Multipurpose sewage treating agent and method for treating sewage by using same |
| CN105478084A (en) * | 2015-09-30 | 2016-04-13 | 太仓碧奇新材料研发有限公司 | Preparation method of aluminium oxide composite material for enriching ruthenium ion in mine-tailing wastewater |
| CN106242059A (en) * | 2016-08-05 | 2016-12-21 | 汪静 | A kind of modularized artificial wetland sewage treatment unit |
| CN106669633A (en) * | 2017-01-19 | 2017-05-17 | 中国环境科学研究院 | Adsorption preparation for wastewater treatment and preparation method thereof |
| CN108212164A (en) * | 2018-01-12 | 2018-06-29 | 中国科学院城市环境研究所 | A kind of type Fenton catalyst and preparation method thereof |
| CN108751390A (en) * | 2018-07-17 | 2018-11-06 | 江苏嘉泽环境发展有限公司 | A kind of algal control formula biologic packing material, preparation method and its application |
| CN112551703A (en) * | 2020-11-20 | 2021-03-26 | 苏州科技大学 | Porous slow-release carbon source filler and preparation method and application thereof |
| CN114455713A (en) * | 2022-02-16 | 2022-05-10 | 山西农业大学 | Domestic sewage purification artificial wetland system for distributed villages |
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Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102746023A (en) * | 2012-06-15 | 2012-10-24 | 中国建筑股份有限公司 | Constructed wetland matrix filling material for simultaneous nitrogen and phosphorus removal and its preparation method |
| CN103073151A (en) * | 2013-01-05 | 2013-05-01 | 清华大学 | Control system and technology of agricultural non-point source pollution based on hedgerows and multilayer percolation ponds |
| CN103073258A (en) * | 2013-02-05 | 2013-05-01 | 中国环境科学研究院 | Filler prepared by using P1-type coal ash molecular sieve and preparation method |
| CN103073258B (en) * | 2013-02-05 | 2014-10-01 | 中国环境科学研究院 | Filler prepared by using P1-type coal ash molecular sieve and preparation method |
| CN103880193A (en) * | 2014-04-08 | 2014-06-25 | 北京师范大学 | Method for treating wastewater from livestock and poultry breeding by constructing vertical flow artificial wetland based on water supply plant sludge |
| CN104003524A (en) * | 2014-05-19 | 2014-08-27 | 湖南大学 | Ecological adsorption floating bed used for treating eutrophication |
| CN104003524B (en) * | 2014-05-19 | 2015-07-01 | 湖南大学 | Ecological adsorption floating bed used for treating eutrophication |
| CN105152340A (en) * | 2015-06-23 | 2015-12-16 | 西安建筑科技大学 | Red mud phosphate-removing filling material for constructed wetland and preparation method thereof |
| CN105198012A (en) * | 2015-08-07 | 2015-12-30 | 刘广利 | Multipurpose sewage treating agent and method for treating sewage by using same |
| CN105478084A (en) * | 2015-09-30 | 2016-04-13 | 太仓碧奇新材料研发有限公司 | Preparation method of aluminium oxide composite material for enriching ruthenium ion in mine-tailing wastewater |
| CN106242059A (en) * | 2016-08-05 | 2016-12-21 | 汪静 | A kind of modularized artificial wetland sewage treatment unit |
| CN106669633A (en) * | 2017-01-19 | 2017-05-17 | 中国环境科学研究院 | Adsorption preparation for wastewater treatment and preparation method thereof |
| CN108212164A (en) * | 2018-01-12 | 2018-06-29 | 中国科学院城市环境研究所 | A kind of type Fenton catalyst and preparation method thereof |
| CN108212164B (en) * | 2018-01-12 | 2021-01-15 | 中国科学院城市环境研究所 | Fenton-like catalyst and preparation method thereof |
| CN108751390A (en) * | 2018-07-17 | 2018-11-06 | 江苏嘉泽环境发展有限公司 | A kind of algal control formula biologic packing material, preparation method and its application |
| CN112551703A (en) * | 2020-11-20 | 2021-03-26 | 苏州科技大学 | Porous slow-release carbon source filler and preparation method and application thereof |
| CN114455713A (en) * | 2022-02-16 | 2022-05-10 | 山西农业大学 | Domestic sewage purification artificial wetland system for distributed villages |
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Application publication date: 20120606 |